1. DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2011 All rights reserved. Comments? feedback@dataworks-ed.com 1st Grade Number Sense 2.1 Know the addition facts (sums to 20) and the corresponding subtraction facts and commit them to memory. Lessons are to be used by EDI-trained teachers only. Learning Objective Name _________________________ Today, we will memorize 1 the addition facts for 10. 1 practice over and over until you remember CFU What are we going to do today? What are we going to memorize? What does memorize mean? Activate (or Provide) Prior Knowledge How many marbles does Jen have? How many marbles does Tony have? Jen Tony Jen and Tony put their marbles together so they could play a game. Together, they had 4 marbles in all. CFU Students, just like Jen and Tony, you already know how to put things or objects together. Just like putting objects together, you can put numbers together too. Putting numbers together is called adding. Today, we will memorize the addition facts for 10. Today, we are going to memorize the addition facts for 10. We are going to memorize the addition facts for 10. Memorize means to practice over and over until you remember.

2. DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2011 All rights reserved. Comments? feedback@dataworks-ed.com 1st Grade Number Sense 2.1 Know the addition facts (sums to 20) and the corresponding subtraction facts and commit them to memory. Lessons are to be used by EDI-trained teachers only. Concept Development To add means to put together to find a sum. A sum is the total amount when you add numbers together.  The + sign tells us to add the numbers.  The = sign stands for equals. Example: 7 + 2 = 9 Seven stars added to two stars equals a sum of 9 stars. CFU In your own words, what does add mean? To add means _________________. When we put numbers together, what is that called? When we put numbers together, that is called ______. In your own words, what is a sum? A sum is ______________________________________________. Which numbers are added correctly? A. 7 + 1 = 8 B. 2 + 1 = 1

3. DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2011 All rights reserved. Comments? feedback@dataworks-ed.com 1st Grade Number Sense 2.1 Know the addition facts (sums to 20) and the corresponding subtraction facts and commit them to memory. Lessons are to be used by EDI-trained teachers only. Importance It is important to memorize the addition facts for 10 so you can: ● use fact families. CFU Does anyone else have another reason why it is important to memorize the addition facts for 10? (pair-share) Why is it important to memorize the addition facts for 10? You may give me one of my reasons or one of your own. Which reason means the most to you? Why? 10+3=13 13-10=3 3+10=13 13-3=10

4. Read aloud 3 times Write the sum 1 time. Read 3 times Write the addition fact 1 time. Read 3 times Read aloud 3 times Write the sum 1 time. Read 3 times. Write the addition fact 1 time. Read 3 times. 11 14 12 13 15 10 + 1 = 11 10 + 2 = 12 10 + 3 = 13 10 + 4 = 14 10 + 5 = 15 12 13 14 15 11 Skill Development and Guided Practice Name ________________________ My Addition Facts for 10

5. Skill Development and Guided Practice (continued) My Addition Facts for 10 Read aloud 3 times Write the sum 1 time. Read 3 times Write the addition fact 1 time. Read 3 times Read aloud 3 times Write the sum 1 time. Read 3 times. Write the addition fact 1 time. Read 3 times. 16 19 17 18 20 10 + 6 = 16 10 + 7 = 17 10 + 8 = 18 10 + 9 = 19 10 + 10 = 20 17 18 19 20 16

6. DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2011 All rights reserved. Comments? feedback@dataworks-ed.com 1st Grade Number Sense 2.1 Know the addition facts (sums to 20) and the corresponding subtraction facts and commit them to memory. Lessons are to be used by EDI-trained teachers only. 13 11 20 14 16 15 12 15 18 11 17 20 19 12 16 13 18 19 Independent Practice Name _______________________________ My Addition Facts for 10